(A) An approved backflow prevention device shall be installed in the service connection line to a consumer’s water system or within any premises where actual or potential hazards to the public potable water system exist. The type and degree of protection required shall be commensurate with the degree of hazard.
(B) An approved air gap separation or reduced pressure principle backflow prevention device shall be installed at the service connection or within any premises where the nature and extent of activities on the premises, or the materials used in connection with the activities, or materials stored on the premises, would present an immediate and dangerous hazard to health should a cross connection occur, even though the cross connection may not exist at the time the backflow prevention device is required to be installed. This includes but is not limited to the following situations:
(1) Premises having an auxiliary water supply;
(2) Premises having internal cross connections that are not correctable, or intricate plumbing arrangements which make it impractical to ascertain whether or not cross connections exist;
(3) Premises where entry is restricted so that inspections for cross connections cannot be made with sufficient frequency or at sufficiently short notice to ensure that cross connections do not exist;
(4) Premises that although not covered by this subchapter are subject to frequent modification which would change their status, or premises that have had violations of this subchapter;
(5) Premises on which any substance is handled under pressure so as to permit entry into the public water supply, or where a cross connection could reasonably be expected to occur. This shall include the handling of process waters and cooling waters; and/or
(6) Premises where materials of a toxic or hazardous nature are handled such that, if back siphonage or back pressure should occur, a serious health hazard may result.
(C) The following types of facilities must install or have in operation an approved air gap separation, atmospheric vacuum breaker, pressure vacuum breaker, double check valve assembly, or reduced pressure principle backflow prevention device as required by the city’ Water Division to protect the public water supply, and the equipment must be installed at these facilities unless all hazardous or potentially hazardous conditions have been eliminated or corrected:
(1) Auxiliary water systems;
(2) Beverage bottling plants and food processing plants;
(3) Canneries, packinghouses and reduction plants;
(4) Carwashing facilities and automobile servicing facilities;
(5) Chemical manufacturing, processing, compounding or treatment plants;
(6) Chemically contaminated water systems;
(7) Dairies and cold storage plants;
(8) Film laboratories, film development facilities and testing laboratories;
(9) Fire protection systems;
(10) Hazardous waste storage and disposal;
(11) Hospitals, mortuaries, clinics, nursing and convalescent homes and medical facilities;
(12) Sprinkler systems and hose connections injecting directly material of a toxic or hazardous nature;
(13) Laundries and dye works and dry cleaners;
(14) Metal manufacturing, cleaning, processing and fabricating plants;
(15) Oil and gas production, storage or transmission properties;
(16) Plating plants;
(17) Printing and publishing facilities;
(18) Research and analytical laboratories;
(19) Sewage and storm drainage facilities pumping stations;
(20) Zoological and horticultural gardens;
(21) All cemetery sprinkler systems;
(22) Pet grooming and veterinarian facilities, kennels, stockyards and feedyards;
(23) Swimming pools;
(24) Cooling coil service lines (refrigeration, air conditioning and the like);
(25) All hot water and steam boiler heating systems with water recirculating;
(26) Lawn irrigation systems. All lawn irrigation systems must have a pressure vacuum breaker or reduced pressure zone backflow prevention device. Backflow devices must be tested at the time of installation and at least every 36 months thereafter;
(27) Hose connections. All garden hose type connections must have hose bib vacuum breakers;
(28) Yard hydrants. The installation of new or replacement yard hydrants where water is available or accessible for drinking or culinary purposes, and which have a drip opening below the ground surface, is prohibited unless the hydrants are equipped with an approved device to prevent entrance of groundwater into chambers connected with the water supply. Yard hydrants or hose bibs which would be used by the consumer to provide water to mix pesticides, fertilizer or other chemicals for direct use or aerial application to surface areas shall be equipped with an anti-siphon vacuum breaker;
(29) Booster pumps. No person shall install or maintain a water service connection to any premises where a booster pump has been installed on the service line to or within such premises, unless the booster pump is equipped with a low pressure cutoff designed to shut off the booster pump when the pressure in the service line on the suction side of the pump drops to 20 pounds per square inch gauge or less. It shall be the duty of the customer to maintain the low pressure cutoff device in proper working order. The Utilities Manager may require testing at any time if it is suspected that a problem exists with the device; and
(30) Multistoried buildings greater than 3 stories. These facilities, falling into 1 or more of the categories listed in this section, will be given 6 months after passage of the ordinance from which this subchapter is derived to comply with this subchapter, except those facilities or systems which are determined by the city’s Water Division to be an immediate or severe health hazard, in which case that system or facility shall be required to comply immediately with this subchapter.
(Prior Code, § 52-146) (Ord. 2939, § 1, 12-14-1993; Am. Ord. 3080, § 1, 12-3-1996)